General Tools and Instruments LT2234C - Manual (Page 6)

SETUP INSTRUCTIONS
INSTALL BATTERIES
Install the three “AAA” batteries that came with the instru-
ment in its battery compartment. To open the compartment,
remove the Phillips head screw holding its cover (callout
1-6) in place and slide it away. When installing the batteries,
use the + and – marks stenciled inside the battery compart-
ment to position them correctly.
OPERATING INSTRUCTIONS
MAKING RPM MEASUREMENTS
To measure the rotational speed of a motor/generator shaft:
1. Identify the target. Determine whether there is a larger
surface to measure than the shaft itself. If some thing with
a larger diameter (for example, a fan or a wheel of any
type) is attached to the shaft, use any flat part of its surface
as the measurement target instead.
2. Prepare the target. Either unplug the generator/motor or
make sure that it cannot be turned on remotely or turn on
automatically. Scrape the target area clean enough so a
piece of tape will stick to it. If the target area is naturally
reflective, cover it with black tape or paint.
3. Attach reflective tape to the target. Cut a 1/2 in. square
piece of reflective tape, remove its backing, and apply it to
the target area.
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